Stage projector structure

• US 20080309888A1
• Filed: 05/23/2008
• Published: 12/18/2008
• Est. Priority Date: 05/23/2007
• Status: Abandoned Application

• Current Assignee: SGM Technology For Lighting Spa (SGM Light A/S)
• Original Assignee: SGM Technology For Lighting Spa (SGM Light A/S)
• Inventors: Giorgi, Gabriele
• Application Number:
  US12/154,506
• Publication Number:
  US 20080309888A1
• Time in Patent Office: Days
• US Class Current: 353/81
• CPC Class Codes: G03B 21/008 using micromirror devices
• CPC Class Codes: G03B 21/20 Lamp housings
• CPC Class Codes: G03B 21/2066 Reflectors in illumination beam in projection beam G03B21/28

Abstract

A projector structure, such as a stage use projector, is provided for managing light projection and suitable for replacing a “Gobo” device. The projector structure has a digital micromirror device (DMD) and a refraction and/or reflection device for circulating light beams (R) around the digital micromirror device and maintaining the coaxiality between the light source and the projection lenses.

Claims

1. A projector structure comprising:

a light source for generating light beams (R) along an emission axis;

a digital micromirror device managing light projection from the projector structure;

at least one of refraction and reflection elements for circulating the light beams (R) around said digital micromirror device; and

one or more projection lenses;

wherein the light source and the one or more projection lenses are coaxial.

2. The projector structure of claim 1, wherein the digital micromirror device and the at least one of refraction and reflection elements form an interchangeable module for replacing a “

Gobo”

device.

3. The projector structure of claim 1, wherein the at least one of refraction and reflection elements comprise a prism and mirror system.

4. The projector structure of claim 1, wherein the at least one of refraction and reflection elements form a circulation unit and subject the light beams (R) to a first deviation substantially perpendicular to the emission axis, a second deviation substantially parallel to the emission axis, a third deviation substantially perpendicular to the emission axis, and a fourth deviation substantially in the direction of the emission axis and towards the digital micromirror device.

5. The projector structure of claim 1, wherein light beams reflected outward from the digital mirror device are substantially coaxial to the light beams (R) generated by the light source.

6. The projector structure of claim 1, wherein the digital micromirror device comprises a reflecting surface facing away from the light beams (R) generated by the light source.

7. The projector structure of claim 1, wherein the at least one of refraction and reflection elements comprise:

a first optical prism and a second optical prism facing each other and twinned in a pair;

a mirror placed in an inclined position for directing the light beams towards the digital micromirror device; and

a third optical prism and a fourth optical prism facing toward each other and twinned in a pair.

8. The projector structure of claim 7, wherein:

the first optical prism deviates the light beams (R) in a direction substantially perpendicular to the emission axis to form first deviated light beams (R1);

the second optical prism deviates the first deviated light beams (R1) in a direction substantially parallel to the emission axis to form second deviated light beams (R2);

the inclined mirror deviates the second deviated light beams (R2) in a direction substantially perpendicular to the emission axis to form third deviated light beams (R3); and

the third optical prism and the fourth optical prism deviate the third deviated light beams (R3) in a direction substantially coaxial to the emission axis (R) and towards the digital micromirror device.

9. The projector structure of claim 1, wherein the digital micromirror device has a normal orientation, at which reflected light beams travel along an axis substantially coaxial with the emission axis of the light beam (R).

10. The projector structure of claim 1, wherein the digital micromirror device has an inclined orientation, at which reflected light beams are directed towards an opaque area in the projector structure.

11. The projector structure of claim 4, wherein the digital micromirror device and the circulation unit form an interchangeable module suitable for replacing a “

Gobo”

device.

12. The projector structure of claim 1 further comprising a parabola reflector, wherein the light source is positioned in the parabola reflector and comprises a discharge lamp having an increased discharge arc.

13. The projector structure of claim 1, wherein the projector structure is a stage projector.

14. A projector structure comprising:

a light source for generating light beams (R) along an emission axis;

a digital micromirror device managing light projection for the projector structure; and

a circulation device for circulating the light beams (R) around said digital micromirror device;

wherein outgoing light beams exiting the projector structure are substantially coaxial with the light beams (R) generated by the light source generated by the light source.

15. The projector structure of claim 14, wherein the digital micromirror device and the at least one of refraction and reflection elements form an interchangeable module for replacing a “

Gobo”

device.

16. The projector structure of claim 14 further comprising one or more projection lenses, wherein the light source and the one or more projection lenses are coaxial.

17. A digital micromirror device module for use in a projector, the module comprising:

a digital micromirror device managing light projection for the projector structure; and

a circulation device for circulating the light beams (R) around the digital micromirror device;

wherein outgoing light beams exiting the module are substantially coaxial with the incoming light beams (R).

18. The digital micromirror device module of claim 17, wherein the digital micromirror device has a reflecting portion facing away from the incoming light beams (R).

19. The digital micromirror device module of claim 17, wherein light beams reflected from the reflecting position are coaxial with the incoming light beams (R).

20. The digital micromirror device module of claim 17, wherein the circulation device comprises:

a first optical prism and a second optical prism twinned in a pair;

a mirror in an inclined position for directing the light beams towards the digital micromirror device; and

a third optical prism and a fourth optical prism twinned in a pair.